Glue stick



FIG. 1 is a top perspective view of a glue stick showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a bottom perspective view thereof;

FIG. 9 is a top perspective view showing the end portion with the cap removed;

FIG. 10 is a front view thereof;

FIG. 11 is a back view thereof;

FIG. 12 is a left thereof;

FIG. 13 is a right view thereof;

FIG. 14 is a top view thereof;

FIG. 15 is a bottom view thereof; and,

FIG. 16 is a bottom perspective view thereof.

The broken lines are included in FIGS. 15 and 16 to show portions of the glue stick cap that form no part of the claimed design. 

CLAIM The ornamental design for a glue stick, as shown and described. 